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gyliu

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sunwei4172(½ð±Ò+30): 2011-06-16 15:45:47
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*data for   ICSD #59625
Coll Code   59625
Rec  Date   2005/04/01
Chem Name   Germanium Oxide
Structured  Ge O2
Sum         Ge1 O2
ANX         AX2
D(calc)     4.29
Title       A neutron diffraction study of the thermal stability of the alpha-
            quartz-type structure in germanium dioxide
Author(s)   Haines, J.;Cambon, O.;Philippot, E.;Chapon, L.;Hull, S.
Reference   Journal of Solid State Chemistry
            (2002), 166, 434-441
Unit Cell   4.98535(2) 4.98535(2) 5.64503(4) 90. 90. 120.
Vol         121.51
Z           3
Space Group P 31 2 1
SG Number   152
Cryst Sys   trigonal/rhombohedral
Pearson     hP9
Wyckoff     c a
R Value     .028
Red Cell    P  4.985 4.985 5.645 90 90 120 121.505
Trans Red   1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000
Comments    Neutron diffraction (powder)
            The structure has been assigned a PDF number (calculated
            powder diffraction data): 01-073-9109
            Rietveld profile refinement applied
            Temperature in Kelvin: 298
            Structure type : Quartz,low
Atom  #   OX   SITE      x           y           z           SOF      H
Ge   1  +4    3 a   .4512(1)    0           .3333          1.         0   
O    1  -2    6 c   .3971(2)    .3023(1)    .2428(1)       1.         0   
Lbl  Type      U11         U22         U33         U12         U13         U23
Ge1  Ge4+  .0088(1)    .0069(3)    .0070(2)    0           0           .0000(2)   
O1   O2-   .0167(4)    .0136(3)    .0107(2)    .0103(2)    .0039(3)    .0035(2)   
*end for    ICSD #59625

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2Â¥2011-06-16 10:30:55
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gyliu

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*data for   ICSD #66595
Coll Code   66595
Rec  Date   1994/01/19
Mod  Date   2004/10/01
Chem Name   Germanium Oxide
Structured  Ge O2
Sum         Ge1 O2
ANX         AX2
D(calc)     4.63
Title       Structure refinement of GeO2 polymorphs at high pressures and
            temperatures by energy-dispersive spectra of powder diffraction
Author(s)   Yamanaka, T.; Ogata, K.
Reference   Journal of Applied Crystallography
            (1991), 24, 111-118
Unit Cell   4.8310(6) 4.8310(6) 5.568(1) 90. 90. 120.
Vol         112.54
Z           3
Space Group P 32 2 1
SG Number   154
Cryst Sys   trigonal/rhombohedral
Pearson     hP9
Wyckoff     c a
R Value     .073
Red Cell    P  4.831 4.831 5.568 90 90 120 112.539
Trans Red   1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000
Comments    Atoms shifted by 0 0 2/3 to fit standard setting
            The structure has been assigned a PDF number (calculated
            powder diffraction data): 01-085-1518
            Pressure in MPa: 4850
            Synchrotron radiation (powder)
            Structure type : Quartz,low
Atom  #   OX   SITE      x           y           z           SOF      H        ITF(B)   
Ge   1  +4    3 a   0.4470(11)  0           0.6667         1.         0             0.6
O    1  -2    6 c   0.3896(15)  0.3129(12)  0.7480(11)     1.         0             1.4
*end for    ICSD #66595
3Â¥2011-06-16 10:31:42
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gyliu

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sunwei4172

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Originally posted by gyliu at 2011-06-16 10:30:55:
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*data for   ICSD #59625
Coll Code   59625
Rec  Date   2005/04/01
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6Â¥2011-06-16 16:27:43
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Originally posted by gyliu at 2011-06-16 16:27:43:
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Originally posted by gyliu at 2011-06-16 10:30:55:
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*data for   ICSD #59625
Coll Code   59625
Rec  Date   2005/04/01
Chem Name   Germanium Oxide
Structured  Ge O2
Sum         Ge1 O2
ANX         AX2
D(calc) ...

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8Â¥2011-06-16 16:45:15
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Originally posted by sunwei4172 at 2011-06-16 16:45:15:
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Originally posted by gyliu at 2011-06-17 08:54:30:
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